1 /* 2 * Copyright (c) 1999, 2021, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.tools.javac.code; 27 28 import java.util.Collection; 29 import java.util.Collections; 30 import java.util.EnumSet; 31 import java.util.HashMap; 32 import java.util.LinkedHashMap; 33 import java.util.Map; 34 35 import javax.lang.model.element.ElementVisitor; 36 37 import com.sun.tools.javac.code.Scope.WriteableScope; 38 import com.sun.tools.javac.code.Source.Feature; 39 import com.sun.tools.javac.code.Symbol.ClassSymbol; 40 import com.sun.tools.javac.code.Symbol.Completer; 41 import com.sun.tools.javac.code.Symbol.CompletionFailure; 42 import com.sun.tools.javac.code.Symbol.MethodSymbol; 43 import com.sun.tools.javac.code.Symbol.ModuleSymbol; 44 import com.sun.tools.javac.code.Symbol.PackageSymbol; 45 import com.sun.tools.javac.code.Symbol.RootPackageSymbol; 46 import com.sun.tools.javac.code.Symbol.TypeSymbol; 47 import com.sun.tools.javac.code.Symbol.VarSymbol; 48 import com.sun.tools.javac.code.Type.BottomType; 49 import com.sun.tools.javac.code.Type.ClassType; 50 import com.sun.tools.javac.code.Type.ErrorType; 51 import com.sun.tools.javac.code.Type.JCPrimitiveType; 52 import com.sun.tools.javac.code.Type.JCVoidType; 53 import com.sun.tools.javac.code.Type.MethodType; 54 import com.sun.tools.javac.code.Type.UnknownType; 55 import com.sun.tools.javac.code.Type.WildcardType; 56 import com.sun.tools.javac.code.Types.UniqueType; 57 import com.sun.tools.javac.comp.Modules; 58 import com.sun.tools.javac.jvm.Target; 59 import com.sun.tools.javac.util.Assert; 60 import com.sun.tools.javac.util.Context; 61 import com.sun.tools.javac.util.Convert; 62 import com.sun.tools.javac.util.DefinedBy; 63 import com.sun.tools.javac.util.DefinedBy.Api; 64 import com.sun.tools.javac.util.Iterators; 65 import com.sun.tools.javac.util.JavacMessages; 66 import com.sun.tools.javac.util.List; 67 import com.sun.tools.javac.util.Name; 68 import com.sun.tools.javac.util.Names; 69 import com.sun.tools.javac.util.Options; 70 71 import static com.sun.tools.javac.code.Flags.*; 72 import static com.sun.tools.javac.code.Kinds.Kind.*; 73 import static com.sun.tools.javac.code.TypeTag.*; 74 75 /** A class that defines all predefined constants and operators 76 * as well as special classes such as java.lang.Object, which need 77 * to be known to the compiler. All symbols are held in instance 78 * fields. This makes it possible to work in multiple concurrent 79 * projects, which might use different class files for library classes. 80 * 81 * <p><b>This is NOT part of any supported API. 82 * If you write code that depends on this, you do so at your own risk. 83 * This code and its internal interfaces are subject to change or 84 * deletion without notice.</b> 85 */ 86 public class Symtab { 87 /** The context key for the symbol table. */ 88 protected static final Context.Key<Symtab> symtabKey = new Context.Key<>(); 89 90 /** Get the symbol table instance. */ 91 public static Symtab instance(Context context) { 92 Symtab instance = context.get(symtabKey); 93 if (instance == null) 94 instance = new Symtab(context); 95 return instance; 96 } 97 98 /** Builtin types. 99 */ 100 public final JCPrimitiveType byteType = new JCPrimitiveType(BYTE, null); 101 public final JCPrimitiveType charType = new JCPrimitiveType(CHAR, null); 102 public final JCPrimitiveType shortType = new JCPrimitiveType(SHORT, null); 103 public final JCPrimitiveType intType = new JCPrimitiveType(INT, null); 104 public final JCPrimitiveType longType = new JCPrimitiveType(LONG, null); 105 public final JCPrimitiveType floatType = new JCPrimitiveType(FLOAT, null); 106 public final JCPrimitiveType doubleType = new JCPrimitiveType(DOUBLE, null); 107 public final JCPrimitiveType booleanType = new JCPrimitiveType(BOOLEAN, null); 108 public final Type botType = new BottomType(); 109 public final JCVoidType voidType = new JCVoidType(); 110 111 private final Names names; 112 private final JavacMessages messages; 113 private final Completer initialCompleter; 114 private final Completer moduleCompleter; 115 116 /** A symbol for the unnamed module. 117 */ 118 public final ModuleSymbol unnamedModule; 119 120 /** The error module. 121 */ 122 public final ModuleSymbol errModule; 123 124 /** A symbol for no module, for use with -source 8 or less 125 */ 126 public final ModuleSymbol noModule; 127 128 /** A symbol for the root package. 129 */ 130 public final PackageSymbol rootPackage; 131 132 /** A symbol that stands for a missing symbol. 133 */ 134 public final TypeSymbol noSymbol; 135 136 /** The error symbol. 137 */ 138 public final ClassSymbol errSymbol; 139 140 /** The unknown symbol. 141 */ 142 public final ClassSymbol unknownSymbol; 143 144 /** A value for the errType, with a originalType of noType */ 145 public final Type errType; 146 147 /** A value for the unknown type. */ 148 public final Type unknownType; 149 150 /** The builtin type of all arrays. */ 151 public final ClassSymbol arrayClass; 152 public final MethodSymbol arrayCloneMethod; 153 154 /** VGJ: The (singleton) type of all bound types. */ 155 public final ClassSymbol boundClass; 156 157 /** The builtin type of all methods. */ 158 public final ClassSymbol methodClass; 159 160 /** A symbol for the java.base module. 161 */ 162 public final ModuleSymbol java_base; 163 164 /** Predefined types. 165 */ 166 public final Type objectType; 167 public final Type objectMethodsType; 168 public final Type objectsType; 169 public final Type classType; 170 public final Type classLoaderType; 171 public final Type stringType; 172 public final Type stringBufferType; 173 public final Type stringBuilderType; 174 public final Type cloneableType; 175 public final Type serializableType; 176 public final Type serializedLambdaType; 177 public final Type varHandleType; 178 public final Type methodHandleType; 179 public final Type methodHandleLookupType; 180 public final Type methodTypeType; 181 public final Type nativeHeaderType; 182 public final Type throwableType; 183 public final Type errorType; 184 public final Type interruptedExceptionType; 185 public final Type illegalArgumentExceptionType; 186 public final Type exceptionType; 187 public final Type runtimeExceptionType; 188 public final Type classNotFoundExceptionType; 189 public final Type noClassDefFoundErrorType; 190 public final Type noSuchFieldErrorType; 191 public final Type assertionErrorType; 192 public final Type incompatibleClassChangeErrorType; 193 public final Type cloneNotSupportedExceptionType; 194 public final Type annotationType; 195 public final TypeSymbol enumSym; 196 public final Type listType; 197 public final Type collectionsType; 198 public final Type comparableType; 199 public final Type comparatorType; 200 public final Type arraysType; 201 public final Type iterableType; 202 public final Type iteratorType; 203 public final Type annotationTargetType; 204 public final Type overrideType; 205 public final Type retentionType; 206 public final Type deprecatedType; 207 public final Type suppressWarningsType; 208 public final Type supplierType; 209 public final Type inheritedType; 210 public final Type profileType; 211 public final Type proprietaryType; 212 public final Type systemType; 213 public final Type autoCloseableType; 214 public final Type trustMeType; 215 public final Type lambdaMetafactory; 216 public final Type stringConcatFactory; 217 public final Type repeatableType; 218 public final Type documentedType; 219 public final Type elementTypeType; 220 public final Type functionalInterfaceType; 221 public final Type previewFeatureType; 222 public final Type previewFeatureInternalType; 223 public final Type typeDescriptorType; 224 public final Type recordType; 225 public final Type switchBootstrapsType; 226 public final Type valueBasedType; 227 public final Type valueBasedInternalType; 228 229 // For serialization lint checking 230 public final Type objectStreamFieldType; 231 public final Type objectInputStreamType; 232 public final Type objectOutputStreamType; 233 public final Type ioExceptionType; 234 public final Type objectStreamExceptionType; 235 public final Type externalizableType; 236 237 /** The symbol representing the length field of an array. 238 */ 239 public final VarSymbol lengthVar; 240 241 /** The symbol representing the final finalize method on enums */ 242 public final MethodSymbol enumFinalFinalize; 243 244 /** The symbol representing the close method on TWR AutoCloseable type */ 245 public final MethodSymbol autoCloseableClose; 246 247 /** The predefined type that belongs to a tag. 248 */ 249 public final Type[] typeOfTag = new Type[TypeTag.getTypeTagCount()]; 250 251 /** The name of the class that belongs to a basic type tag. 252 */ 253 public final Name[] boxedName = new Name[TypeTag.getTypeTagCount()]; 254 255 /** A hashtable containing the encountered top-level and member classes, 256 * indexed by flat names. The table does not contain local classes. 257 * It should be updated from the outside to reflect classes defined 258 * by compiled source files. 259 */ 260 private final Map<Name, Map<ModuleSymbol,ClassSymbol>> classes = new HashMap<>(); 261 262 /** A hashtable containing the encountered packages. 263 * the table should be updated from outside to reflect packages defined 264 * by compiled source files. 265 */ 266 private final Map<Name, Map<ModuleSymbol,PackageSymbol>> packages = new HashMap<>(); 267 268 /** A hashtable giving the encountered modules. 269 */ 270 private final Map<Name, ModuleSymbol> modules = new LinkedHashMap<>(); 271 272 private final Map<Types.UniqueType, VarSymbol> classFields = new HashMap<>(); 273 274 public VarSymbol getClassField(Type type, Types types) { 275 return classFields.computeIfAbsent( 276 new UniqueType(type, types), k -> { 277 Type arg = null; 278 if (type.getTag() == ARRAY || type.getTag() == CLASS) { 279 /* Temporary treatment for primitive class: Given a primitive class V that implements 280 I1, I2, ... In, V.class is typed to be Class<? extends Object & I1 & I2 .. & In> 281 */ 282 if (type.isPrimitiveClass()) { 283 List<Type> bounds = List.of(objectType).appendList(((ClassSymbol) type.tsym).getInterfaces()); 284 arg = new WildcardType(bounds.size() > 1 ? types.makeIntersectionType(bounds) : objectType, BoundKind.EXTENDS, boundClass); 285 } else { 286 arg = types.erasure(type); 287 } 288 } 289 else if (type.isPrimitiveOrVoid()) 290 arg = types.boxedClass(type).type; 291 else 292 throw new AssertionError(type); 293 294 Type t = new ClassType( 295 classType.getEnclosingType(), List.of(arg), classType.tsym); 296 return new VarSymbol( 297 STATIC | PUBLIC | FINAL, names._class, t, type.tsym); 298 }); 299 } 300 301 public void initType(Type type, ClassSymbol c) { 302 type.tsym = c; 303 typeOfTag[type.getTag().ordinal()] = type; 304 } 305 306 public void initType(Type type, String name) { 307 initType( 308 type, 309 new ClassSymbol( 310 PUBLIC, names.fromString(name), type, rootPackage)); 311 } 312 313 public void initType(Type type, String name, String bname) { 314 initType(type, name); 315 boxedName[type.getTag().ordinal()] = names.fromString("java.lang." + bname); 316 } 317 318 /** The class symbol that owns all predefined symbols. 319 */ 320 public final ClassSymbol predefClass; 321 322 /** Enter a class into symbol table. 323 * @param s The name of the class. 324 */ 325 private Type enterClass(String s) { 326 return enterClass(java_base, names.fromString(s)).type; 327 } 328 329 public void synthesizeEmptyInterfaceIfMissing(final Type type) { 330 final Completer completer = type.tsym.completer; 331 type.tsym.completer = new Completer() { 332 @Override 333 public void complete(Symbol sym) throws CompletionFailure { 334 try { 335 completer.complete(sym); 336 } catch (CompletionFailure e) { 337 sym.flags_field |= (PUBLIC | INTERFACE); 338 ((ClassType) sym.type).supertype_field = objectType; 339 } 340 } 341 342 @Override 343 public boolean isTerminal() { 344 return completer.isTerminal(); 345 } 346 }; 347 } 348 349 public void synthesizeBoxTypeIfMissing(final Type type) { 350 ClassSymbol sym = enterClass(java_base, boxedName[type.getTag().ordinal()]); 351 final Completer completer = sym.completer; 352 sym.completer = new Completer() { 353 @Override 354 public void complete(Symbol sym) throws CompletionFailure { 355 try { 356 completer.complete(sym); 357 } catch (CompletionFailure e) { 358 sym.flags_field |= PUBLIC; 359 ((ClassType) sym.type).supertype_field = objectType; 360 MethodSymbol boxMethod = 361 new MethodSymbol(PUBLIC | STATIC, names.valueOf, 362 new MethodType(List.of(type), sym.type, 363 List.nil(), methodClass), 364 sym); 365 sym.members().enter(boxMethod); 366 MethodSymbol unboxMethod = 367 new MethodSymbol(PUBLIC, 368 type.tsym.name.append(names.Value), // x.intValue() 369 new MethodType(List.nil(), type, 370 List.nil(), methodClass), 371 sym); 372 sym.members().enter(unboxMethod); 373 } 374 } 375 376 @Override 377 public boolean isTerminal() { 378 return completer.isTerminal(); 379 } 380 }; 381 } 382 383 // Enter a synthetic class that is used to mark classes in ct.sym. 384 // This class does not have a class file. 385 private Type enterSyntheticAnnotation(String name) { 386 // for now, leave the module null, to prevent problems from synthesizing the 387 // existence of a class in any specific module, including noModule 388 ClassType type = (ClassType)enterClass(java_base, names.fromString(name)).type; 389 ClassSymbol sym = (ClassSymbol)type.tsym; 390 sym.completer = Completer.NULL_COMPLETER; 391 sym.flags_field = PUBLIC|ACYCLIC|ANNOTATION|INTERFACE; 392 sym.erasure_field = type; 393 sym.members_field = WriteableScope.create(sym); 394 type.typarams_field = List.nil(); 395 type.allparams_field = List.nil(); 396 type.supertype_field = annotationType; 397 type.interfaces_field = List.nil(); 398 return type; 399 } 400 401 /** Constructor; enters all predefined identifiers and operators 402 * into symbol table. 403 */ 404 protected Symtab(Context context) throws CompletionFailure { 405 context.put(symtabKey, this); 406 407 names = Names.instance(context); 408 409 // Create the unknown type 410 unknownType = new UnknownType(); 411 412 messages = JavacMessages.instance(context); 413 414 MissingInfoHandler missingInfoHandler = MissingInfoHandler.instance(context); 415 416 Target target = Target.instance(context); 417 rootPackage = new RootPackageSymbol(names.empty, null, 418 missingInfoHandler, 419 target.runtimeUseNestAccess()); 420 421 // create the basic builtin symbols 422 unnamedModule = new ModuleSymbol(names.empty, null) { 423 { 424 directives = List.nil(); 425 exports = List.nil(); 426 provides = List.nil(); 427 uses = List.nil(); 428 ModuleSymbol java_base = enterModule(names.java_base); 429 com.sun.tools.javac.code.Directive.RequiresDirective d = 430 new com.sun.tools.javac.code.Directive.RequiresDirective(java_base, 431 EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED)); 432 requires = List.of(d); 433 } 434 @Override 435 public String toString() { 436 return messages.getLocalizedString("compiler.misc.unnamed.module"); 437 } 438 }; 439 addRootPackageFor(unnamedModule); 440 unnamedModule.enclosedPackages = unnamedModule.enclosedPackages.prepend(unnamedModule.unnamedPackage); 441 442 errModule = new ModuleSymbol(names.empty, null) { 443 { 444 directives = List.nil(); 445 exports = List.nil(); 446 provides = List.nil(); 447 uses = List.nil(); 448 ModuleSymbol java_base = enterModule(names.java_base); 449 com.sun.tools.javac.code.Directive.RequiresDirective d = 450 new com.sun.tools.javac.code.Directive.RequiresDirective(java_base, 451 EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED)); 452 requires = List.of(d); 453 } 454 }; 455 addRootPackageFor(errModule); 456 457 noModule = new ModuleSymbol(names.empty, null) { 458 @Override public boolean isNoModule() { 459 return true; 460 } 461 }; 462 addRootPackageFor(noModule); 463 464 noSymbol = new TypeSymbol(NIL, 0, names.empty, Type.noType, rootPackage) { 465 @Override @DefinedBy(Api.LANGUAGE_MODEL) 466 public <R, P> R accept(ElementVisitor<R, P> v, P p) { 467 return v.visitUnknown(this, p); 468 } 469 }; 470 471 // create the error symbols 472 errSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.any, null, rootPackage); 473 errType = new ErrorType(errSymbol, Type.noType); 474 475 unknownSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.fromString("<any?>"), null, rootPackage); 476 unknownSymbol.members_field = new Scope.ErrorScope(unknownSymbol); 477 unknownSymbol.type = unknownType; 478 479 // initialize builtin types 480 initType(byteType, "byte", "Byte"); 481 initType(shortType, "short", "Short"); 482 initType(charType, "char", "Character"); 483 initType(intType, "int", "Integer"); 484 initType(longType, "long", "Long"); 485 initType(floatType, "float", "Float"); 486 initType(doubleType, "double", "Double"); 487 initType(booleanType, "boolean", "Boolean"); 488 initType(voidType, "void", "Void"); 489 initType(botType, "<nulltype>"); 490 initType(errType, errSymbol); 491 initType(unknownType, unknownSymbol); 492 493 // the builtin class of all arrays 494 arrayClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Array, noSymbol); 495 496 // VGJ 497 boundClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Bound, noSymbol); 498 boundClass.members_field = new Scope.ErrorScope(boundClass); 499 500 // the builtin class of all methods 501 methodClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Method, noSymbol); 502 methodClass.members_field = new Scope.ErrorScope(boundClass); 503 504 // Create class to hold all predefined constants and operations. 505 predefClass = new ClassSymbol(PUBLIC|ACYCLIC, names.empty, rootPackage); 506 WriteableScope scope = WriteableScope.create(predefClass); 507 predefClass.members_field = scope; 508 509 // Get the initial completer for Symbols from the ClassFinder 510 initialCompleter = ClassFinder.instance(context).getCompleter(); 511 rootPackage.members_field = WriteableScope.create(rootPackage); 512 513 // Enter symbols for basic types. 514 scope.enter(byteType.tsym); 515 scope.enter(shortType.tsym); 516 scope.enter(charType.tsym); 517 scope.enter(intType.tsym); 518 scope.enter(longType.tsym); 519 scope.enter(floatType.tsym); 520 scope.enter(doubleType.tsym); 521 scope.enter(booleanType.tsym); 522 scope.enter(errType.tsym); 523 524 // Enter symbol for the errSymbol 525 scope.enter(errSymbol); 526 527 Source source = Source.instance(context); 528 if (Feature.MODULES.allowedInSource(source)) { 529 java_base = enterModule(names.java_base); 530 //avoid completing java.base during the Symtab initialization 531 java_base.completer = Completer.NULL_COMPLETER; 532 java_base.visiblePackages = Collections.emptyMap(); 533 } else { 534 java_base = noModule; 535 } 536 537 // Get the initial completer for ModuleSymbols from Modules 538 moduleCompleter = Modules.instance(context).getCompleter(); 539 540 // Enter predefined classes. All are assumed to be in the java.base module. 541 objectType = enterClass("java.lang.Object"); 542 objectMethodsType = enterClass("java.lang.runtime.ObjectMethods"); 543 objectsType = enterClass("java.util.Objects"); 544 classType = enterClass("java.lang.Class"); 545 stringType = enterClass("java.lang.String"); 546 stringBufferType = enterClass("java.lang.StringBuffer"); 547 stringBuilderType = enterClass("java.lang.StringBuilder"); 548 cloneableType = enterClass("java.lang.Cloneable"); 549 throwableType = enterClass("java.lang.Throwable"); 550 serializableType = enterClass("java.io.Serializable"); 551 serializedLambdaType = enterClass("java.lang.invoke.SerializedLambda"); 552 varHandleType = enterClass("java.lang.invoke.VarHandle"); 553 methodHandleType = enterClass("java.lang.invoke.MethodHandle"); 554 methodHandleLookupType = enterClass("java.lang.invoke.MethodHandles$Lookup"); 555 methodTypeType = enterClass("java.lang.invoke.MethodType"); 556 errorType = enterClass("java.lang.Error"); 557 illegalArgumentExceptionType = enterClass("java.lang.IllegalArgumentException"); 558 interruptedExceptionType = enterClass("java.lang.InterruptedException"); 559 exceptionType = enterClass("java.lang.Exception"); 560 runtimeExceptionType = enterClass("java.lang.RuntimeException"); 561 classNotFoundExceptionType = enterClass("java.lang.ClassNotFoundException"); 562 noClassDefFoundErrorType = enterClass("java.lang.NoClassDefFoundError"); 563 noSuchFieldErrorType = enterClass("java.lang.NoSuchFieldError"); 564 assertionErrorType = enterClass("java.lang.AssertionError"); 565 incompatibleClassChangeErrorType = enterClass("java.lang.IncompatibleClassChangeError"); 566 cloneNotSupportedExceptionType = enterClass("java.lang.CloneNotSupportedException"); 567 annotationType = enterClass("java.lang.annotation.Annotation"); 568 classLoaderType = enterClass("java.lang.ClassLoader"); 569 enumSym = enterClass(java_base, names.java_lang_Enum); 570 enumFinalFinalize = 571 new MethodSymbol(PROTECTED|FINAL|HYPOTHETICAL, 572 names.finalize, 573 new MethodType(List.nil(), voidType, 574 List.nil(), methodClass), 575 enumSym); 576 listType = enterClass("java.util.List"); 577 collectionsType = enterClass("java.util.Collections"); 578 comparableType = enterClass("java.lang.Comparable"); 579 comparatorType = enterClass("java.util.Comparator"); 580 arraysType = enterClass("java.util.Arrays"); 581 iterableType = enterClass("java.lang.Iterable"); 582 iteratorType = enterClass("java.util.Iterator"); 583 annotationTargetType = enterClass("java.lang.annotation.Target"); 584 overrideType = enterClass("java.lang.Override"); 585 retentionType = enterClass("java.lang.annotation.Retention"); 586 deprecatedType = enterClass("java.lang.Deprecated"); 587 suppressWarningsType = enterClass("java.lang.SuppressWarnings"); 588 supplierType = enterClass("java.util.function.Supplier"); 589 inheritedType = enterClass("java.lang.annotation.Inherited"); 590 repeatableType = enterClass("java.lang.annotation.Repeatable"); 591 documentedType = enterClass("java.lang.annotation.Documented"); 592 elementTypeType = enterClass("java.lang.annotation.ElementType"); 593 systemType = enterClass("java.lang.System"); 594 autoCloseableType = enterClass("java.lang.AutoCloseable"); 595 autoCloseableClose = new MethodSymbol(PUBLIC, 596 names.close, 597 new MethodType(List.nil(), voidType, 598 List.of(exceptionType), methodClass), 599 autoCloseableType.tsym); 600 trustMeType = enterClass("java.lang.SafeVarargs"); 601 nativeHeaderType = enterClass("java.lang.annotation.Native"); 602 lambdaMetafactory = enterClass("java.lang.invoke.LambdaMetafactory"); 603 stringConcatFactory = enterClass("java.lang.invoke.StringConcatFactory"); 604 functionalInterfaceType = enterClass("java.lang.FunctionalInterface"); 605 previewFeatureType = enterClass("jdk.internal.javac.PreviewFeature"); 606 previewFeatureInternalType = enterSyntheticAnnotation("jdk.internal.PreviewFeature+Annotation"); 607 typeDescriptorType = enterClass("java.lang.invoke.TypeDescriptor"); 608 recordType = enterClass("java.lang.Record"); 609 switchBootstrapsType = enterClass("java.lang.runtime.SwitchBootstraps"); 610 valueBasedType = enterClass("jdk.internal.ValueBased"); 611 valueBasedInternalType = enterSyntheticAnnotation("jdk.internal.ValueBased+Annotation"); 612 // For serialization lint checking 613 objectStreamFieldType = enterClass("java.io.ObjectStreamField"); 614 objectInputStreamType = enterClass("java.io.ObjectInputStream"); 615 objectOutputStreamType = enterClass("java.io.ObjectOutputStream"); 616 ioExceptionType = enterClass("java.io.IOException"); 617 objectStreamExceptionType = enterClass("java.io.ObjectStreamException"); 618 externalizableType = enterClass("java.io.Externalizable"); 619 620 synthesizeEmptyInterfaceIfMissing(autoCloseableType); 621 synthesizeEmptyInterfaceIfMissing(cloneableType); 622 synthesizeEmptyInterfaceIfMissing(serializableType); 623 synthesizeEmptyInterfaceIfMissing(lambdaMetafactory); 624 synthesizeEmptyInterfaceIfMissing(serializedLambdaType); 625 synthesizeEmptyInterfaceIfMissing(stringConcatFactory); 626 synthesizeBoxTypeIfMissing(doubleType); 627 synthesizeBoxTypeIfMissing(floatType); 628 synthesizeBoxTypeIfMissing(voidType); 629 630 // Enter a synthetic class that is used to mark internal 631 // proprietary classes in ct.sym. This class does not have a 632 // class file. 633 proprietaryType = enterSyntheticAnnotation("sun.Proprietary+Annotation"); 634 635 // Enter a synthetic class that is used to provide profile info for 636 // classes in ct.sym. This class does not have a class file. 637 profileType = enterSyntheticAnnotation("jdk.Profile+Annotation"); 638 MethodSymbol m = new MethodSymbol(PUBLIC | ABSTRACT, names.value, intType, profileType.tsym); 639 profileType.tsym.members().enter(m); 640 641 // Enter a class for arrays. 642 // The class implements java.lang.Cloneable and java.io.Serializable. 643 // It has a final length field and a clone method. 644 ClassType arrayClassType = (ClassType)arrayClass.type; 645 arrayClassType.supertype_field = objectType; 646 arrayClassType.interfaces_field = 647 List.of(cloneableType, serializableType); 648 649 arrayClass.members_field = WriteableScope.create(arrayClass); 650 lengthVar = new VarSymbol( 651 PUBLIC | FINAL, 652 names.length, 653 intType, 654 arrayClass); 655 arrayClass.members().enter(lengthVar); 656 arrayCloneMethod = new MethodSymbol( 657 PUBLIC, 658 names.clone, 659 new MethodType(List.nil(), objectType, 660 List.nil(), methodClass), 661 arrayClass); 662 arrayClass.members().enter(arrayCloneMethod); 663 664 if (java_base != noModule) 665 java_base.completer = moduleCompleter::complete; //bootstrap issues 666 667 } 668 669 /** Define a new class given its name and owner. 670 */ 671 public ClassSymbol defineClass(Name name, Symbol owner) { 672 ClassSymbol c = new ClassSymbol(0, name, owner); 673 c.completer = initialCompleter; 674 return c; 675 } 676 677 /** Create a new toplevel or member class symbol with given name 678 * and owner and enter in `classes' unless already there. 679 */ 680 public ClassSymbol enterClass(ModuleSymbol msym, Name name, TypeSymbol owner) { 681 Assert.checkNonNull(msym); 682 Name flatname = TypeSymbol.formFlatName(name, owner); 683 ClassSymbol c = getClass(msym, flatname); 684 if (c == null) { 685 c = defineClass(name, owner); 686 doEnterClass(msym, c); 687 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) { 688 // reassign fields of classes that might have been loaded with 689 // their flat names. 690 c.owner.members().remove(c); 691 c.name = name; 692 c.owner = owner; 693 c.fullname = ClassSymbol.formFullName(name, owner); 694 } 695 return c; 696 } 697 698 public ClassSymbol getClass(ModuleSymbol msym, Name flatName) { 699 Assert.checkNonNull(msym, flatName::toString); 700 return classes.getOrDefault(flatName, Collections.emptyMap()).get(msym); 701 } 702 703 public PackageSymbol lookupPackage(ModuleSymbol msym, Name flatName) { 704 return lookupPackage(msym, flatName, false); 705 } 706 707 private PackageSymbol lookupPackage(ModuleSymbol msym, Name flatName, boolean onlyExisting) { 708 Assert.checkNonNull(msym); 709 710 if (flatName.isEmpty()) { 711 //unnamed packages only from the current module - visiblePackages contains *root* package, not unnamed package! 712 return msym.unnamedPackage; 713 } 714 715 if (msym == noModule) { 716 return enterPackage(msym, flatName); 717 } 718 719 msym.complete(); 720 721 PackageSymbol pack; 722 723 pack = msym.visiblePackages.get(flatName); 724 725 if (pack != null) 726 return pack; 727 728 pack = getPackage(msym, flatName); 729 730 if ((pack != null && pack.exists()) || onlyExisting) 731 return pack; 732 733 boolean dependsOnUnnamed = msym.requires != null && 734 msym.requires.stream() 735 .map(rd -> rd.module) 736 .anyMatch(mod -> mod == unnamedModule); 737 738 if (dependsOnUnnamed) { 739 //msyms depends on the unnamed module, for which we generally don't know 740 //the list of packages it "exports" ahead of time. So try to lookup the package in the 741 //current module, and in the unnamed module and see if it exists in one of them 742 PackageSymbol unnamedPack = getPackage(unnamedModule, flatName); 743 744 if (unnamedPack != null && unnamedPack.exists()) { 745 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack); 746 return unnamedPack; 747 } 748 749 pack = enterPackage(msym, flatName); 750 pack.complete(); 751 if (pack.exists()) 752 return pack; 753 754 unnamedPack = enterPackage(unnamedModule, flatName); 755 unnamedPack.complete(); 756 if (unnamedPack.exists()) { 757 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack); 758 return unnamedPack; 759 } 760 761 return pack; 762 } 763 764 return enterPackage(msym, flatName); 765 } 766 767 private static final Map<ModuleSymbol, ClassSymbol> EMPTY = new HashMap<>(); 768 769 public void removeClass(ModuleSymbol msym, Name flatName) { 770 classes.getOrDefault(flatName, EMPTY).remove(msym); 771 } 772 773 public Iterable<ClassSymbol> getAllClasses() { 774 return () -> Iterators.createCompoundIterator(classes.values(), v -> v.values().iterator()); 775 } 776 777 private void doEnterClass(ModuleSymbol msym, ClassSymbol cs) { 778 classes.computeIfAbsent(cs.flatname, n -> new HashMap<>()).put(msym, cs); 779 } 780 781 /** Create a new member or toplevel class symbol with given flat name 782 * and enter in `classes' unless already there. 783 */ 784 public ClassSymbol enterClass(ModuleSymbol msym, Name flatname) { 785 Assert.checkNonNull(msym); 786 PackageSymbol ps = lookupPackage(msym, Convert.packagePart(flatname)); 787 Assert.checkNonNull(ps); 788 Assert.checkNonNull(ps.modle); 789 ClassSymbol c = getClass(ps.modle, flatname); 790 if (c == null) { 791 c = defineClass(Convert.shortName(flatname), ps); 792 doEnterClass(ps.modle, c); 793 return c; 794 } else 795 return c; 796 } 797 798 /** Check to see if a package exists, given its fully qualified name. 799 */ 800 public boolean packageExists(ModuleSymbol msym, Name fullname) { 801 Assert.checkNonNull(msym); 802 PackageSymbol pack = lookupPackage(msym, fullname, true); 803 return pack != null && pack.exists(); 804 } 805 806 /** Make a package, given its fully qualified name. 807 */ 808 public PackageSymbol enterPackage(ModuleSymbol currModule, Name fullname) { 809 Assert.checkNonNull(currModule); 810 PackageSymbol p = getPackage(currModule, fullname); 811 if (p == null) { 812 Assert.check(!fullname.isEmpty(), () -> "rootPackage missing!; currModule: " + currModule); 813 p = new PackageSymbol( 814 Convert.shortName(fullname), 815 enterPackage(currModule, Convert.packagePart(fullname))); 816 p.completer = initialCompleter; 817 p.modle = currModule; 818 doEnterPackage(currModule, p); 819 } 820 return p; 821 } 822 823 private void doEnterPackage(ModuleSymbol msym, PackageSymbol pack) { 824 packages.computeIfAbsent(pack.fullname, n -> new HashMap<>()).put(msym, pack); 825 msym.enclosedPackages = msym.enclosedPackages.prepend(pack); 826 } 827 828 private void addRootPackageFor(ModuleSymbol module) { 829 doEnterPackage(module, rootPackage); 830 PackageSymbol unnamedPackage = new PackageSymbol(names.empty, rootPackage) { 831 @Override 832 public String toString() { 833 return messages.getLocalizedString("compiler.misc.unnamed.package"); 834 } 835 }; 836 unnamedPackage.modle = module; 837 //we cannot use a method reference below, as initialCompleter might be null now 838 unnamedPackage.completer = s -> initialCompleter.complete(s); 839 unnamedPackage.flags_field |= EXISTS; 840 module.unnamedPackage = unnamedPackage; 841 } 842 843 public PackageSymbol getPackage(ModuleSymbol module, Name fullname) { 844 return packages.getOrDefault(fullname, Collections.emptyMap()).get(module); 845 } 846 847 public ModuleSymbol enterModule(Name name) { 848 ModuleSymbol msym = modules.get(name); 849 if (msym == null) { 850 msym = ModuleSymbol.create(name, names.module_info); 851 addRootPackageFor(msym); 852 msym.completer = s -> moduleCompleter.complete(s); //bootstrap issues 853 modules.put(name, msym); 854 } 855 return msym; 856 } 857 858 public ModuleSymbol getModule(Name name) { 859 return modules.get(name); 860 } 861 862 //temporary: 863 public ModuleSymbol inferModule(Name packageName) { 864 if (packageName.isEmpty()) 865 return java_base == noModule ? noModule : unnamedModule;//! 866 867 ModuleSymbol msym = null; 868 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName); 869 if (map == null) 870 return null; 871 for (Map.Entry<ModuleSymbol,PackageSymbol> e: map.entrySet()) { 872 if (!e.getValue().members().isEmpty()) { 873 if (msym == null) { 874 msym = e.getKey(); 875 } else { 876 return null; 877 } 878 } 879 } 880 return msym; 881 } 882 883 public List<ModuleSymbol> listPackageModules(Name packageName) { 884 if (packageName.isEmpty()) 885 return List.nil(); 886 887 List<ModuleSymbol> result = List.nil(); 888 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName); 889 if (map != null) { 890 for (Map.Entry<ModuleSymbol, PackageSymbol> e: map.entrySet()) { 891 if (!e.getValue().members().isEmpty()) { 892 result = result.prepend(e.getKey()); 893 } 894 } 895 } 896 return result; 897 } 898 899 public Collection<ModuleSymbol> getAllModules() { 900 return modules.values(); 901 } 902 903 public Iterable<ClassSymbol> getClassesForName(Name candidate) { 904 return classes.getOrDefault(candidate, Collections.emptyMap()).values(); 905 } 906 907 public Iterable<PackageSymbol> getPackagesForName(Name candidate) { 908 return packages.getOrDefault(candidate, Collections.emptyMap()).values(); 909 } 910 }